Something

void    my_putnbr_base_pad(unsigned int nbr, char *base, int pad)
{
  int   base_len;

  base_len = my_strlen(base);
  if (pad > 0)
    {
      my_putnbr_base_pad(nbr / base_len, base, pad - 1);
      my_putchar(base[nbr % base_len]);
    }
}

void    print_addr(char *str)
{
  my_putnbr_base_pad((unsigned int)str, "0123456789abcdef", 8);
  my_putchar(':');
}

void    print_hexa(char *str, int size)
{
  int   i;

  i = 0;
  while (i < 16)
    {
      if((i % 2) == 0)
        my_putchar(' ');
      if (i < size)
        my_putnbr_base_pad(str[i], "0123456789abcdef", 2);
      else
        my_putstr("  ");
      i++;
    }
}

void    print_ascii(char *str, int size)
{
  int   i;

  my_putstr("  ");
  i = 0;
  while ((i < 16) && (i < size))
    {
      if ((str[i] >= 32) && (str[i] < 127))
        my_putchar(str[i]);
      else
        my_putchar('.');
      i++;
    }
}

void    my_showmem_alpha(char *str, int size)
{
  print_addr(str);
  print_hexa(str, size);
  print_ascii(str, size);
  my_putchar('\n');
}

int     my_showmem(char *str, int size)
{
  int   i;

 
  i = 0;
  while (i < size)
    {
      my_showmem_alpha(&str[i], size - i);
      i = i + 16;
    }
  return (0);
}